Weather Forecast

A weather forecast is a statement of expected meteorological conditions for a specified time or period, and for a specified area or portion of airspace (ICAO Annex 3 - Meteorology)

A weather forecast is compiled by a weather forecaster or meteorological office based on a number of factors, which include the following:

• Recent weather conditions,
• Understanding of the processes that contribute to changing weather conditions,
• Experience,
• Statistical data,
• Computer prediction,
• Climatic factors.

Aeronautical weather forecasts contain some or all of the following information: